Pistol grip mug



FIG. 1 is a perspective view of a pistol grip mug showing my new design;

FIG. 2 is a side elevation view thereof, the opposite side elevation view being a substantial mirror image thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a rear elevation view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a pistol grip mug, as shown and described. 